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test: added tests for SDEFunctionExpr #3313

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This PR adds test for SDEFunctionExpr

Checklist

  • Appropriate tests were added
  • Any code changes were done in a way that does not break public API
  • All documentation related to code changes were updated
  • The new code follows the
    contributor guidelines, in particular the SciML Style Guide and
    COLPRAC.
  • Any new documentation only uses public API

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Signed-off-by: sivasathyaseeelan <[email protected]>
@test eval(SDEFunctionExpr(de).args[7]) == UniformScaling{Bool}(true)

# Test with non-trivial mass matrix
u0 = [1.0, 2.0, 3.0]
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Why would this have a non-trivial mass matrix?

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@sivasathyaseeelan sivasathyaseeelan Jan 12, 2025

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non-trival mass matrix will test

_M = (u0 === nothing || M == I) ? M : ArrayInterface.restructure(u0 .* u0', M)

the above condition in SDEFunctionExpr

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